<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/postpic/" method="POST" enctype="multipart/form-data">
    <input name="image" type="file" id="exampleInputFile">
    <button id="photo" class="btn btn-danger" type="submit">上传文件</button>

</form>
</body>
</html>